JP6355587B2 - Rivet fastening device - Google Patents

Description

  The present invention relates to a rivet fastening device, and more particularly to a rivet fastening device in which a bolt having any head can be used.

Current riveting tools require a mandrel to be combined, and rivet fastening is accomplished by tightening a rivet nut clockwise on the mandrel and pulling the mandrel backward by the user applying force with the tool. After completion of the fastening, the nut is fixed on the work, and the mandrel and the work need to be separated by rotating the mandrel counterclockwise.
A commercially available rivet tool uses a special mandrel. In other words, each manufacturer designs its own mandrel. If the mandrel and screw part standards do not match, they cannot be used in combination, and the rivet nut on the user's hand and the mandrel attached to the tool may be incompatible. The most prominent example is where a metric mandrel is combined with the user's tool and the user's rivet nut is an inch thread standard. If the mandrel breaks, the user will need to find a mandrel from the same manufacturer as the tool, but the importer may not have received it.

The above situation is also a problem for manufacturers. This is because the standard of the threaded part is very large, and the mandrel needs to match the standard of the threaded part of the rivet nut. There are some minor standards, and 50 mandrels may not sell in 10 years. However, mass production is necessary at the time of manufacture. Sometimes, even if the user directly inquires about the mandrel from the manufacturer, the transaction may be difficult and unprofitable for both parties due to the relationship between shipping costs and international remittance fees.
Commercially available pneumatic rivet tools employ a method that uses existing bolts for mandrels, but currently only hexagon socket head cap cap screws are used for mandrels. is there. As shown in FIG. 1, the size of the sleeve 10 varies depending on the diameter of the bolt 12. The fixing element 14 is necessary for combining the bolt 12 and the parts in the tool and rotating them simultaneously.
In the manual riveting tool, one end of the mandrel is fixed to a part in the tool, and when the user rotates the part, the mandrel rotates forward and backward. That is, the mandrel and this part need to rotate simultaneously. In use, the rivet nut is first tightened on the mandrel, and after fastening, the mandrel is rotated and pulled out from the rivet nut. The pneumatic riveting tool is similar, but this part is rotated by a pneumatic motor.
The current commercial product design employs such a method with the fixing element 14 to prevent the bolt 12 from rotating independently, but there is a major problem here. The first is that the user can use only a hexagon socket head bolt as a mandrel. The second is that the size of the hexagonal hole of the hexagon socket head cap screw differs depending on the size of the bolt. That is, it is necessary to use the fixing element 14 suitable for the size of the hexagon socket head cap screw. If there is no fixing element 14 that fits the hexagon socket head bolt, the hexagon socket head bolt cannot be used.

  In consideration of the above points, the present invention proposes a rivet fastening device for solving the problems of the prior art.

  The main object of the present invention is to use bolts having various heads without being limited by the size and shape of the bolt heads by fixing the bolts using push rods, retaining rings and outer sleeves. An object of the present invention is to provide a rivet fastening device that can be used.

In order to achieve the above object, the rivet fastening device provided by the present invention includes an inner sleeve, an outer sleeve, a retaining ring, and an actuator. A first space is formed between the actuator and the inner sleeve. The inner sleeve has a second space communicating with the first space, the first space partially surrounds the second space, and a push rod is inserted in the first space and the second space. The outer sleeve has a first surface on the inner circumference of one end thereof, and the other end is located in the first space and partially surrounds the second space and is crowned on the inner sleeve. The retaining ring has a second surface and a third surface that are installed corresponding to each other. The retaining ring is located in the outer sleeve and is in close contact with the first surface using the second surface, and the outer sleeve and the retaining ring. A bolt is inserted into the bolt, the screw body of the bolt is exposed from the outer sleeve and screwed into the rivet nut, the head of the bolt is located in the first space, and the third surface and the push rod are in close contact with each other The bolt is fixed by the push rod, the retaining ring and the outer sleeve. The actuator is assembled with the inner sleeve, and the inner sleeve, the push rod, the outer sleeve, the retaining ring and the rivet nut are interlocked and moved simultaneously on the actuator by the movement of the inner sleeve, thereby fastening the rivet nut.

  In the present invention, by using the inner sleeve 20, the retaining ring 24 and the push rod 16 to fix the bolt 18, the bolt head shape is not limited.

FIG. 3 is an exploded view of a prior art bolt, sleeve and fastening element. It is a structure external view of the present invention. It is structural sectional drawing of this invention. It is a structure exploded external view of the present invention. It is a structure exploded sectional view of the present invention. It is the structure perspective view which caught the front of the conical ring of this invention. It is the structure perspective view which caught the back of the conical ring of the present invention. It is a disassembled external view of the inner sleeve, outer sleeve, bolt and push rod of the present invention. It is a structure sectional view of the inner sleeve, outer sleeve, bolt, and push rod of the present invention.

  For a better understanding and appreciation of the structural features and effects achieved of the present invention, a preferred embodiment will now be described with reference to the drawings.

Please refer to FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. The rivet fastening device of the present invention includes a push rod 16, a bolt 18, an inner sleeve 20, an outer sleeve 22, a retaining ring 24, an actuator 26, an external protective tube 28 and an internal protective tube 30.
The push rod 16 is a metal push rod, the bolt 18 is a metal bolt and becomes a mandrel, and the shape of the bolt 18 is not limited. The inner sleeve 20 is a metal inner sleeve, the outer sleeve 22 is a metal outer sleeve, and the retaining ring 24 is a metal retaining ring. The actuator 26 here is a manual actuator, for example, and is fixed by being assembled with the inner sleeve 20 like a manual handle. A first space 32 is formed between the actuator 26 and the inner sleeve 20. The inner sleeve 20 has a second space 34 that communicates with the first space 32, and the first space 32 partially surrounds the second space 34. The push rod 16 has a first threaded portion on the side wall of the head, the second space 34 has a second threaded portion, and the push rod 16 utilizes the first and second threaded portions. The first sleeve 32 and the second space 34 are inserted into the inner sleeve 20 by being screwed with each other.

The outer sleeve 22 has a first surface 36 at the inner periphery of one end thereof, the other end is located in the first space 32 and partially surrounds the second space 34, so that the outer sleeve 22 is crowned on the inner sleeve 20. Is done. The retaining ring 24 has a second surface 38 and a third surface 40 that are placed in correspondence with each other. The retaining ring 24 is positioned in the outer sleeve 22 and is in close contact with the first surface 36 using the second surface 38, and both the retaining ring 24 and one end of the outer sleeve 22 that is in close contact with the retaining ring 24 are positioned in the first space 32. To do. A bolt 18 is inserted into the outer sleeve 22 and the retaining ring 24, and a screw body of the bolt 18 is exposed from the outer sleeve 22 and screwed into the rivet nut 42.
The bolt head of the bolt 18 is located in the first space 32 and is in close contact between the third surface 40 and the push rod 16, and a recess 44 is provided on the upper surface of the bolt head. The bolt is fixed by the push rod 16, the retaining ring 24, and the outer sleeve 22 while being inserted into the recess 44 and in close contact with the bolt head. In order to effectively prevent the bolt 18 from rotating alone, for example, the retaining ring 24 has a conical ring design, but is not limited thereto. The first surface 36 is a first conical surface that gradually narrows from the inside to the outside of the outer sleeve 22, and the second surface 38 is a second conical surface corresponding to the first conical surface, and the third surface Reference numeral 40 denotes a plane.
When the push rod 16 is screwed together with the inner sleeve 20 using the first screw portion and the second screw portion, the push rod 16 pushes the bolt 18 forward, and when the bolt 18 is pushed forward, the retaining ring 24 clamps the bolt 18 tightly. The inclination of the second conical surface decreases along the inclination of the first conical surface, and conversely pushes the bolt 18 along the inclination due to the metal toughness of the retaining ring 24. This principle is the same as that of a tube (collet). The push rod 16, the bolt 18, the inner sleeve 20, the outer sleeve 22, and the retaining ring 24 are combined to form a component unit that operates simultaneously by mutual pressing and friction between metals.
In the present invention, since the bolt 18 is fixed using the push rod 16, the outer sleeve 22, and the retaining ring 24, the size and shape of the concave portion 44 of the head of the bolt 18 are not limited, and various heads can be obtained. Bolt 18 can be used. The actuator 26 uses the movement of the inner sleeve 20, and the inner sleeve 20, the push rod 16, the outer sleeve 22, the retaining ring 24, the bolt 18, and the rivet nut 42 move together on the actuator 26 in conjunction with each other to move the rivet nut 42. Is concluded.

Part of the external protective pipe 28 is Kanmuri設on the outer sleeve 22 is positioned in the first space 32, the screw of the bolt 18 is exposed from the outer protective pipe 28 with penetrating outer protective tube 28. A part of the inner protective tube 30 is inserted on the inner wall of the outer protective tube 28, and the screw body of the bolt 18 penetrates the inner protective tube 30 and is exposed from the inner protective tube 30 and screwed into the rivet nut 42.

  The upper surface of the head of the bolt 18 may not be provided with a recess, and the upper surface may be a flat surface. The bolt 18 can be fixed using the push rod 16, the retaining ring 24, and the outer sleeve 22 only by the push rod 16 being in close contact with the upper surface of the bolt head, so that it is not necessary to consider the appearance design of the bolt head. .

For the actuator 2 6, in addition to performing the manual actuator, it can be executed hydraulically by electric or pneumatic actuators. Please refer to FIG. 8 and FIG. Here, a push rod 16, a bolt 18, an inner sleeve 20, an outer sleeve 22 and a retaining ring 24 on a pneumatic actuator are shown. Since the inner sleeve 20 is assembled with the pneumatic actuator in a detachable manner, both the inner sleeve 20 and the push rod 16 can be exchanged.

DESCRIPTION OF SYMBOLS 10 Sleeve 12 Bolt 14 Fastening element 16 Push rod 18 Bolt 20 Inner sleeve 22 Outer sleeve 24 Retaining ring 26 Actuator 28 External protective tube 30 Internal protective tube 32 First space 34 Second space 36 First surface 38 Second surface 40 Third Surface 42 Rivet nut 44 Recess

Claims (12)

The first space,
A inner sleeve having a second space communicating with the first space, the first space surrounds the second space part, said first space and said push rod is in the second space in the inserted The inner sleeve,
An outer sleeve having a first surface at an inner peripheral edge of one end, the other end being located in the first space, and partially surrounding the second space and being crowned on the inner sleeve;
A retaining ring having a second surface and a third surface installed corresponding to each other, wherein the retaining ring is located in the outer sleeve and is in close contact with the first surface using the second surface, Bolts are inserted into the outer sleeve and the retaining ring, a screw body of the bolt is exposed from the outer sleeve and screwed with a rivet nut, and a bolt head of the bolt is located in the first space. A fastening ring that is in intimate contact between the third surface and the push rod, and wherein the bolt is fixed by the push rod, the retaining ring and the outer sleeve;
An actuator assembled with the inner sleeve, and using the movement of the inner sleeve, the inner sleeve, the push rod, the outer sleeve, the retaining ring, and the rivet nut move together on the actuator simultaneously. fastening the rivet nut by, and the actuator, only including,
The first space is formed between the actuator and the inner sleeve .
Rivet fastening device. Wherein any one end of the outer sleeve in close contact with the Re fastener ring and its is positioned in the first space, rivet fastening device according to claim 1. Part A external protection tube that will be Kanmuri設on the outer sleeve positioned in said first space, said screw body said exposed from the outer protective tube while penetrating the outer protective tube The rivet fastening device according to claim 2, further comprising an external protective tube threadedly engaged with the rivet nut.   A part of the internal protective tube is inserted on the inner wall of the external protective tube, and the screw body penetrates the internal protective tube and is exposed from the internal protective tube and screwed with the rivet nut. The rivet fastening device according to claim 3, further comprising an inner protective tube.   The push rod has a first threaded portion on a side wall, the second space has a second threaded portion on the side wall, and the push rod uses the first threaded portion and the second threaded portion to The rivet fastening device according to claim 1, wherein the rivet fastening device is inserted into the first space and the second space by being screwed to each other.   The rivet fastening device according to claim 5, wherein the first screw portion is provided on the side wall of the rod head of the push rod.   2. The rivet fastening device according to claim 1, wherein a concave portion is provided on an upper surface of the bolt head, and the push rod is inserted into the concave portion and closely contacts the bolt head.   The retaining ring is a conical ring, the first surface is a first conical surface gradually narrowing from the inside to the outside of the outer sleeve, and the second surface is formed on the first conical surface. The rivet fastening device according to claim 1, wherein the rivet fastening device is a corresponding second conical surface and the third surface is a flat surface.   The rivet fastening device according to claim 1, wherein the retaining ring is a metal retaining ring, and the outer sleeve is a metal outer sleeve.   The rivet fastening device according to claim 1, wherein the inner sleeve is a metal inner sleeve, the push rod is a metal push rod, and the bolt is a metal bolt.   The rivet fastening device according to claim 1, wherein the actuator is any one of a manual type, an electric type, a hydraulic type, and a pneumatic type actuator.   The rivet fastening device according to claim 11, wherein the manual actuator is a manual handle.

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